Company lists · Data refreshed September 2026

Top 25 IT audit consulting firms worldwide

Name: IT audit consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 7,687 companies tracked

RevenueBase identified 7,687 IT audit consulting firms worldwide as of September 2026 and tracks 136,974 professional contacts across them, including 33,197 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers IT audit consulting firms worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026. Country and city lists for IT audit consulting firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

7,687Companies

136,974Contacts tracked

33,197Verified emails

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The 25 largest IT audit consulting firms worldwide

Ranked by team size

Top 25 of 7,687 IT audit consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to IT audit consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Protiviti	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 21, 2026	5,001-10,000	8,779 contacts →
	Partial evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 21, 2026
2	Kpmg Lower Gulf	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 21, 2026	1,001-5,000	1,939 contacts →
	Partial evidence “For almost 50 years, KPMG Lower Gulf Limited has been providing audit, tax and advisory services to a broad range of domestic and international, public and private sector clients…” Source: RevenueBase Database · checked Sep 21, 2026
3	BDO Brazil	Indirect evidence	Sp, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,791 contacts →
	Indirect evidence “Presidida por Raul Corrêa da Silva, a BDO RCS foi fundada em 2001 e desde então mantém participação expressiva no mercado de auditorias.” Source: RevenueBase Database · checked Sep 21, 2026
4	Grant Thornton Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 21, 2026	1,001-5,000	1,724 contacts →
	Indirect evidence “Grant Thornton är ett ledande revisions- och rådgivningsföretag med över 1400 medarbetare som erbjuder tjänster inom revision, skatt, redovisning och specialistrådgivning.” Source: RevenueBase Database · checked Sep 21, 2026
5	Sikich	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,688 contacts →
	Partial evidence “Sikich offers the public and private sectors a diverse platform of professional services across consulting, technology, and compliance.” Source: RevenueBase Database · checked Sep 21, 2026
6	Kpmg Norway	Indirect evidence	Oslo, NorwayHQ checked Sep 21, 2026	1,001-5,000	1,498 contacts →
	Indirect evidence “KPMG er mest kjent som revisorer, forretningskonsulenter og advokater, men vi er også mye mer.” Source: RevenueBase Database · checked Sep 21, 2026
7	RSM Ebner Stolz	Indirect evidence	Stuttgart, GermanyHQ checked Sep 21, 2026	1,001-5,000	1,442 contacts →
	Indirect evidence “Wollen Sie jemanden, der Sie auch beim Sprung in neue Märkte und bei allen anstehenden Herausforderungen begleitet?” Source: RevenueBase Database · checked Sep 21, 2026
8	Crowe UK	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,395 contacts →
	Strong evidence “Crowe UK is a leading audit, tax, advisory and consulting firm with a national presence to complement our international reach.” Source: RevenueBase Database · checked Sep 21, 2026
9	BDO Switzerland	Strong evidence	Zürich, SwitzerlandHQ checked Sep 21, 2026	1,001-5,000	1,090 contacts →
	Strong evidence “BDO is one of the leading audit, accounting and consulting firms in Switzerland.” Source: RevenueBase Database · checked Sep 21, 2026
10	SS Kothari Mehta & CO	Indirect evidence	New Delhi, IndiaHQ checked Sep 21, 2026	501-1,000	957 contacts →
	Indirect evidence “S S Kothari Mehta & Company (SSKM) is chartered accountant firm established in 1953 in Kolkata and later on expanded its base to New Delhi, Chandigarh & Mumbai as well.” Source: RevenueBase Database · checked Sep 21, 2026
11	Crowe UAE	Strong evidence	Business Bay, United Arab EmiratesHQ checked Sep 21, 2026	501-1,000	625 contacts →
	Strong evidence “Crowe UAE is a leading audit, tax, advisory, and consulting firm with a strong national presence.” Source: RevenueBase Database · checked Sep 21, 2026
12	BDO Perú	Indirect evidence	San Isidro, PeruHQ checked Sep 21, 2026	501-1,000	603 contacts →
	Indirect evidence “La red global de BDO se extiende a lo largo de 166 países y territorios, con 115,661 personas trabajando en 1,776 oficinas y todas bajo un mismo objetivo: brindar a nuestros…” Source: RevenueBase Database · checked Sep 21, 2026
13	Sharp & Tannan Group	Indirect evidence	Mumbai, IndiaHQ checked Sep 21, 2026	501-1,000	601 contacts →
	Indirect evidence “Founded in 1934, by two gentlemen to whom integrity was paramount, Mr.” Source: RevenueBase Database · checked Sep 21, 2026
14	BDO Austria	Indirect evidence	Wien, AustriaHQ checked Sep 21, 2026	1,001-5,000	599 contacts →
	Indirect evidence “Holen Sie sich eine Datenschutzzertifizierung für Ihr Unternehmen.” Source: RevenueBase Database · checked Sep 21, 2026
15	Dean Dorton	Strong evidence	Lexington, KY, United StatesHQ checked Sep 21, 2026	501-1,000	590 contacts →
	Strong evidence “Dean Dorton provides an integrated suite of audit, tax, business management, consulting, and technology solutions.” Source: RevenueBase Database · checked Sep 21, 2026
16	BDO Israel	Partial evidence	Tel Aviv, IsraelHQ checked Sep 21, 2026	1,001-5,000	574 contacts →
	Partial evidence “BDO Israel is a dynamic and business oriented accounting and consulting firm, ranking amongst the five leading industry firms in Israel and part of the international network BDO.” Source: RevenueBase Database · checked Sep 21, 2026
17	Bennett Thrasher	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	201-500	558 contacts →
	Partial evidence “Bennett Thrasher provides proven guidance for financial confidence through premier tax, audit, advisory, and outsourcing solutions.” Source: RevenueBase Database · checked Sep 21, 2026
18	Mazars In The UK	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	505 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
19	Prager Metis Cpas	Partial evidence	New York, United StatesHQ checked Sep 21, 2026	201-500	467 contacts →
	Partial evidence “Prager Metis CPAs is an independent, full service, public accounting and consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
20	Mahajan & Aibara	Strong evidence	Mumbai, IndiaHQ checked Sep 21, 2026	201-500	458 contacts →
	Strong evidence “We offer Internal Audit & Risk Consulting related services.” Source: RevenueBase Database · checked Sep 21, 2026
21	Pp&c Auditores Independentes	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	201-500	440 contacts →
	Indirect evidence “A PP & C Auditores Independentes é uma firma de auditores e especialistas nas áreas de impostos e consultoria empresarial.” Source: RevenueBase Database · checked Sep 21, 2026
22	Nexia S&a	Partial evidence	Paris, FranceHQ checked Sep 21, 2026	201-500	436 contacts →
	Partial evidence “Nexia S&A, acteur de l’audit et du conseil, apporte des solutions pertinentes à ses clients dans les domaines comptables et financiers et les accompagne pour les mettre en œuvre.” Source: RevenueBase Database · checked Sep 21, 2026
23	Wipfli India	Strong evidence	Bengaluru, IndiaHQ checked Sep 21, 2026	201-500	433 contacts →
	Strong evidence “Wipfli India (formerly SpiderLogic) provides services on Audit, Accounting, Technology Consulting services to customers of Wipfli LLP through its development centers in Pune and…” Source: RevenueBase Database · checked Sep 21, 2026
24	Pbmares, LLP	Strong evidence	Newport News, VA, United StatesHQ checked Sep 21, 2026	201-500	393 contacts →
	Strong evidence “PBMares is a Certified Public Accounting and consulting firm focused on serving the audit, tax, accounting, and consulting needs of companies and individuals.” Source: RevenueBase Database · checked Sep 21, 2026
25	Clark Nuber PS	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 21, 2026	201-500	347 contacts →
	Indirect evidence “Clark Nuber is an award-winning Certified Public Accounting firm located in the Seattle Metro Area.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: IT audit consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names IT audit consulting firms.
Partial evidence: Its own public description names part of IT audit consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT audit consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 7,687 IT audit consulting firms worldwide

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IT audit consulting firms worldwide at a glance

As of Sep 21, 2026

24.2%Verified-email coverage

17.8Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · Sao Paulo

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

3,871

11-50

2,839

51-200

677

201-500

173

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among IT audit consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for IT audit consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “IT audit consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names IT audit consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among IT audit consulting firms, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 33,197 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

IT audit consulting firms by location

41 lists · largest first

Every IT audit consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names IT audit consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many IT audit consulting firms are there worldwide?

RevenueBase identified 7,687 IT audit consulting firms worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Protiviti, headquartered in Menlo Park, tops this list with the largest team on record.

Which country has the most IT audit consulting firms?

The United States leads with 969 companies, followed by India (611) and France (449). Every IT audit consulting firms list by country and city is linked on this page.

Which city has the most IT audit consulting firms?

Sao Paulo leads with 135 headquartered companies, followed by Dubai (128) and Paris (126).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 33,197 verified decision-maker contacts tracked across these 7,687 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.